Strong detonation behaviours in stratified media bound by non-reactive gases
文献类型：期刊论文
| 作者 | Li HY(李昊洋)1,2; Yang PF(杨鹏飞)1,2 ; Wang, Chun1,2
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| 刊名 | JOURNAL OF FLUID MECHANICS
 |
| 出版日期 | 2025-05-08 |
| 卷号 | 1010页码:28 |
| 关键词 | detonation wave shock wave |
| ISSN号 | 0022-1120 |
| DOI | 10.1017/jfm.2025.324 |
| 通讯作者 | Yang, Pengfei(young1505@foxmail.com) |
| 英文摘要 | In this study, the propagation behaviour of detonation waves in a channel filled with stratified media is analysed using a detailed chemical reaction model. Two symmetrical layers of non-reactive gas are introduced near the upper and lower walls to encapsulate a stoichiometric premixed H2-air mixture. The effects of gas temperature and molecular weight of the non-reactive layers on the detonation wave's propagation mode and velocity are examined thoroughly. The results reveal that as the non-reactive gas temperature increases, the detonation wave front transitions from a 'convex' to a 'concave' shape, accompanied by an increase in wave velocity. Notably, the concave wave front comprises detached shocks, oblique shocks and detonation waves, with the overall wave system propagating at a velocity exceeding the theoretical Chapman-Jouguet speed, indicating the emergence of a strong detonation wave. Furthermore, when the molecular weight of non-reactive layers varies, the results qualitatively align with those obtained from temperature variations. To elucidate the formation mechanism of different detonation wave front shapes, a dimensionless parameter $\eta$ (defined as a function of the specific heat ratio and sound speed) is proposed. This parameter unifies the effects of temperature and molecular weight, confirming that the specific heat ratio and sound speed of non-reactive layers are the primary factors governing the detonation wave propagation mode. Additionally, considering the effect of mixture inhomogeneity on the detonation reaction zone, the stream tube contraction theory is proposed, successfully explaining why strong detonation waves form in stratified mixtures. Numerical results show good agreement with theoretical predictions, validating the proposed model. |
| 分类号 | 一类/力学重要期刊 |
| WOS关键词 | RICHTMYER-MESHKOV INSTABILITY ; OBLIQUE SHOCK-WAVES ; PROPAGATION ; SIMULATION ; CONFINEMENT ; COMBUSTION ; MECHANISM ; MODEL ; LAYER |
| 资助项目 | National Natural Science Foundation of China[12202014] ; National Natural Science Foundation of China[12072353] ; National Natural Science Foundation of China[12132017] |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001483872100001 |
| 资助机构 | National Natural Science Foundation of China |
| 其他责任者 | 杨鹏飞 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/101193]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Li HY,Yang PF,Wang, Chun. Strong detonation behaviours in stratified media bound by non-reactive gases[J]. JOURNAL OF FLUID MECHANICS,2025,1010:28. |
| APA | 李昊洋,杨鹏飞,&Wang, Chun.(2025).Strong detonation behaviours in stratified media bound by non-reactive gases.JOURNAL OF FLUID MECHANICS,1010,28. |
| MLA | 李昊洋,et al."Strong detonation behaviours in stratified media bound by non-reactive gases".JOURNAL OF FLUID MECHANICS 1010(2025):28. |
入库方式： OAI收割
来源：力学研究所
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